JPS58187640A - Speed change control of electronic control type automatic transmission - Google Patents

Abstract

PURPOSE:To simplify the change of pattern for changing-over gears and make produce satisfactory change effect even in a low power engine by a method wherein power pattern and economic pattern for changing-over gears are set in advance n a micro- computer for speed change control so as to be operated by means of a single change- over switch. CONSTITUTION:At the same time the engine is started, the data from respective sensors are inputted to a computer ECU. Then an OD cut (change-over) switch is decided whether ON or OFF. When the decision is NO, a shift position is decided whether in a D-range or in a S-range. When the decision is in the S-range, a second speed power pattern is selected, while when the decision is in the D-range, a third speed power pattern is selected. On the other hand, when the decision of the OD cut switch is YES, the shift position is also decided whether in the D-range or in the S-range. When the decision is in the S-range, a third speed economic pattern is selected, while when the decision is in the D-range, a fourth speed economic pattern is selected. In such a manner as mentioned above, under the consideration that the OD cut switch is operated when power property is requested, the speed change pattern is intended to be changed to power pattern or economic pattern by turning the OD cut switch ON and OFF.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed change control method for an electronically controlled 1/2 speed transmission.

In recent years, with the commercialization of electronically controlled automatic modification machines, the shift pattern in the drive range, low range, and second range O can be changed to an economy pattern that emphasizes fuel efficiency, a normal pattern that emphasizes power performance, and a normal pattern that emphasizes power performance by changing the shift points. It is possible to switch to the power pattern and use it.

However, while these three shift patterns are effective in optimizing the engine's fuel efficiency and dynamism, switching between these patterns is unfamiliar to Dophipers. Since it is an automatic car, there is a problem that it is quite complicated for Douyver to select from the five patterns of Jin by switching the switch one by one. Also, 2000C
In an engine that has sufficient power performance of C or higher, even if six such shift patterns are set, each pattern! Although the engine performance can be fully demonstrated, the 2000
For engines with relatively low power performance of cc or less, there is a problem in that the effects of improving power performance, fuel efficiency, etc. are not so great due to the setting of the Tamaro pattern.

The present invention has been made in view of the above circumstances, and is an electronically controlled system that can simplify the operation of changing the speed change pattern, and can fully demonstrate the effect of changing the speed change pattern even in an engine with relatively low power performance. The object of the present invention is to provide a shift control method for an automatic transmission.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIG.

FIG. 1 shows a schematic diagram of an electronically controlled automatic transmission.

However, since this is already known, it will be briefly explained here.

The 10 rotations of the engine are transmitted to the planetary gear unit 3 via the torque converter including the rotation speed shift 2a, and after being shifted at a predetermined speed ratio, the AAA sensor 4
The rotation speed is detected by the rotation speed and transmitted to the driving wheels 6 via the differential gear 5. The speed of the planetary gear unit 5 is controlled by the solenoid (
The operation of the lock-up watch 2a of the torque converter 2 is controlled by the solenoid pulp 7.

The solenoid pulp 7 is controlled by a microcomputer ECU, which receives a signal from the throttle position sensor 9 regarding the throttle opening, a signal from the vehicle speed sensor 4 regarding the vehicle speed, and an overdrive cut signal. An operation signal 2 of a switch (hereinafter referred to as OD cut switch) 10 and a signal related to a shift position from a shift position scene sensor 11 are input. Note that signals from a knock sensor, an engine water sensor, an altitude sensor, a brake sensor, etc. are also input to this microcomputer pECU, but these signals are not shown in the figure.

Next, a method of controlling the electronically controlled automatic transmission of this example will be explained below.

First, the g speed gain in this false control is as shown in Figures 2 to 4.
It is set to tighten. In this figure, the horizontal axis represents the vehicle speed, the vertical axis represents the throttle opening, and the shift fins between each gear are shown. That is, the microcomputer mCU uses the throttle opening, vehicle speed, shift position, etc. as input signals to control the solenoid valve 7 according to the shift line as shown in the figure.
By outputting a control signal, the servo mechanism 8 and the like are actuated by hydraulic pressure to change gears. In this diagram, shift fin 1→2 is an upshift fin that switches from 1st gear to 2nd gear, and shift fin 1←2 is a downshift fin that switches from 2nd gear to 11th gear. This is a downshift fin that does this. Similarly, the shift twins 2→5 and 2←3 are the upshift line and downshift fin between the second and fifth gears, respectively, and the nine shift twins 3→4 and 3←4 are the third shift line and downshift line, respectively. These are an upshift fin and a downshift twin between the transmission gear and the 4th gear. Figure 2 shows the 4 Liao economy pattern (hereinafter referred to as E pattern), which emphasizes fuel economy and ease of use when the shift position is in the drive range (hereinafter referred to as 'fIkD range) and the OD cut switch is turned off. Figure 3 shows the 03rd speed E pattern that emphasizes fuel efficiency and safety, which is set when the OD cut switch remains off and the shift position is set to the second range (hereinafter referred to as S range), and Figure 4 shows the shift position scene. This is the 5 Liao Bao pattern (hereinafter referred to as P pattern) that emphasizes power performance and is set when the OD cut switch is turned on and the OD cut switch is turned on.
Leave the D Kabuto swift switch on and set the shift positive scene to S.
This is a 2nd speed P pattern with power performance xi set when the range is 9.

In this example, the P pattern has a small number of gears and a wide low gear range so that sufficient motive power can be ensured even with a small displacement engine. (In other words, the shift fins are biased toward the high-speed gear so that the shift side up is slower than the E pattern.Continuously, the control method for selecting the shift pattern shown in Figures 2 to 5 is shown in Figure J86. The explanation will be based on the flowchart shown in .

When the microcomputer #ECU is reset 7) to the initial state by the start, the input of the combinator F:cU^ and the notator is then performed in step 2. The data entered here is OD cut swift 10
, a shift position sensor 11, a vehicle speed sensor 4, a throttle position sensor t9, a knock sensor, an engine water temperature sensor, an altitude sensor, a brake sensor, and the like.

Next, in step 6, it is determined whether the OD cut switch is on or off. In this judgment, if YO2, proceed to step 5; if NO, proceed to step 4. Then, in step 4, it is determined whether the shift position is in D range or S range, and if it is in S range, #
! The 2aP bar shown in FIG. 5 is selected, and if the vehicle is in the D range, the 5-speed P pattern shown in FIG. 4 is selected. Also,
The same applies when proceeding to step 5.
A judgment is made as to whether the mode is in the D range or S range, and if it is in the S range, the 3jlK pattern shown in Figure 3 is selected.
If the vehicle is in the D range, the 4th speed E pattern shown in FIG. 2 is selected.

In this way, in this example, considering that when the OD cuff shifter is operated, power is required, the shift pattern is changed to the P pattern and the E pattern by turning it on and off. In addition, the number of shift patterns has been reduced, and the spacing between the shift lines has been widened so that the effect of switching the shift pattern can be sufficiently obtained even in engines with low power performance. It has the feature that it is much simpler than the conventional method, and that sufficient effects can be obtained by pattern switching even with an engine having relatively low power performance.

Note that the switch for changing the shift pattern is not limited to the OD cut switch, and other switches may be provided in the new nine.

That is, the present invention sets a power pattern and an economy pattern 0 for switching the PFC gear unit in the micro combinator of an electronically controlled automatic transmission, and selects these two patterns with a single changeover switch. The speed change control method for the electronically controlled automatic transmission used in the present invention has favorable features in that the switching operation of the switch for changing the speed change pattern can be simplified and applied to a wide range of engines.

[Brief explanation of the drawing]

The drawings embody the present invention and show nine embodiments.
The figure is an explanatory diagram showing the configuration of an electronically controlled single dynamic transmission, Figure 2 is a diagram showing the shift line of a 4-speed economy pattern, and Figure 3 is a diagram showing the shift fins of a 6-speed economy train. , FIG. 14 is an H diagram showing the shift fins of the 3111 power pattern, FIG. 5 is a line section showing the shift fins of the 2-speed power pattern, and FIG. 6 is an explanatory diagram showing a flowchart of the control method of this example. 1...Engine 2...Torque converter 6...Pufnet gear unit 4...Vehicle speed sensor 7...Solenoid valve 8...T-bottom mechanism 9...Throttle valve 1 Sensor 10 - OD cut switch (selector switch) 11 -
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Claims (1)

[Claims] This is a speed change control method for an electronically controlled automatic transmission in which a speed change mechanism mainly consisting of a torque converter and a push gear F is controlled by a solenoid valve controlled by a microphone combination. Te, the micro-combi - one is the power pattern that emphasizes power performance etc. and the economy pattern that emphasizes fuel efficiency etc. of the rounding of the planetary gear unit switching (turns are set in advance, These two) (take 1 turn)
A speed change control method for an electronically controlled automatic converting machine, characterized in that it is selected and used by two changeover switches,